My new BIG Brushless motor

[BrianG]

Only 75 HP eh? That's 55,950 watts! :dft002: It would need a "few" batteries. And that must weigh quite a bit! A bit much for an R/C truck, unless it was a life size go cart or something. And for $6k, you could get a few LMTs and ESCs, with some cash left over for batteries. :)

What's the kV rating and max rpm of that motor - just for giggles?

[Jato Killer]

Originally Posted by BrianG

Only What's the kV rating and max rpm of that motor - just for giggles?

These aren't rated using the kV method like the DC setups are. The speed on AC induction motors is controlled by the frequency of the AC power. Here in the states, 60 Hz is the normal frequency on the mains.

You can vary the speed with a VFD (variable frequency drive), but some motors don't take kindly to being operated below their rated speed (heat buildup).

This particular motor runs at 3525 RPM at 460 Volts/60Hz. It is rated at 768 foot pounds of startup torque, and comfortably operates at 128 foot pounds when it is up to speed. Because it is water cooled, it can run well into the nameplate service-factor without too much concern. When I test this one on Monday, it will likely run somewhere around 105 amps at 480 volts.

Testing pumps around a 480 panel isn't for everyone, especially when hoses blow off (which does happen).

Oh well, gotta make the bacon so I can buy my playtoys. :027: